{
  "version": "SIU-2026a",
  "print_id": "2026-09-27-commodity",
  "date": "2026-09-27",
  "status": "provisional",
  "basket_costs": [
    {
      "model_id": "deepseek-v3.2",
      "cost_usd": "0.001835"
    },
    {
      "model_id": "llama-3.3-70b-deepinfra",
      "cost_usd": "0.000710"
    },
    {
      "model_id": "mistral-small-3.2-24b-instruct",
      "cost_usd": "0.000662"
    },
    {
      "model_id": "qwen-2.5-72b-instruct",
      "cost_usd": "0.002524"
    }
  ],
  "weights": {
    "source": "equal",
    "values": [
      {
        "model_id": "deepseek-v3.2",
        "weight": "0.250000"
      },
      {
        "model_id": "llama-3.3-70b-deepinfra",
        "weight": "0.250000"
      },
      {
        "model_id": "mistral-small-3.2-24b-instruct",
        "weight": "0.250000"
      },
      {
        "model_id": "qwen-2.5-72b-instruct",
        "weight": "0.250000"
      }
    ]
  },
  "dated_siu": "0.001433",
  "exchange_rate_table": [
    {
      "model_id": "deepseek-v3.2",
      "usd_per_siu": "0.0018",
      "spread_to_index": "0.2810",
      "siu_per_usd": "544.8"
    },
    {
      "model_id": "llama-3.3-70b-deepinfra",
      "usd_per_siu": "0.0007",
      "spread_to_index": "-0.5043",
      "siu_per_usd": "1407.8"
    },
    {
      "model_id": "mistral-small-3.2-24b-instruct",
      "usd_per_siu": "0.0007",
      "spread_to_index": "-0.5380",
      "siu_per_usd": "1510.7"
    },
    {
      "model_id": "qwen-2.5-72b-instruct",
      "usd_per_siu": "0.0025",
      "spread_to_index": "0.7613",
      "siu_per_usd": "396.2"
    }
  ],
  "sensitivity_block": [
    {
      "policy_variant": "cache-enabled: 40% of T2 input at 10% of input price",
      "dated_siu": "0.0009597",
      "delta": "-0.3302",
      "applies_to": [
        "deepseek-v3.2",
        "llama-3.3-70b-deepinfra",
        "mistral-small-3.2-24b-instruct",
        "qwen-2.5-72b-instruct"
      ]
    },
    {
      "policy_variant": "batch-discount: 50% off input and output",
      "dated_siu": "0.0007184",
      "delta": "-0.4986",
      "applies_to": [
        "deepseek-v3.2",
        "llama-3.3-70b-deepinfra",
        "mistral-small-3.2-24b-instruct",
        "qwen-2.5-72b-instruct"
      ]
    }
  ],
  "rounding": {
    "dated_siu_sig_figs": 4,
    "basket_cost_dp": 6,
    "usd_per_siu_dp": 4,
    "spread_dp": 4,
    "siu_per_usd_dp": 1,
    "mode": "ROUND_HALF_UP",
    "siu_per_usd_mode": "ROUND_DOWN",
    "notes": "Applied at publication only; all intermediate arithmetic is full-precision decimal. dated_siu rounds to significant figures, not a fixed decimal-place count, so its precision scales with the price rather than being lost as it falls (found live, 2026-09-25 — see docs/methodology.md's Rounding section). basket_cost carries more decimal places than dated_siu needs at any price level so the published print stays reproducible from its own published figures. siu_per_usd truncates so it never overstates the work a dollar buys."
  },
  "cost_of_production_usd": "0.0929",
  "price_snapshot_ref": "price-snapshot-merged-2026-09-27T01-07-56.927Z.json",
  "methodology_version": "v0-draft",
  "methodology_revision": "rules-2026-09-25",
  "series": "commodity",
  "signature": "0xd74e08c6ca1db88b9e187e6382c8d21600ae981450f426a76018d429b25949e508125277bdfaec8a6d85db89f72a18d8bbe2c31215adabe222179d6adb414da2",
  "public_key": "0x030c598ee35bd24b6942e9155bd36c1dbbe77936c700f859e75b0168b0e25cb299",
  "anchor": {
    "chain": "base-sepolia",
    "status": "anchored",
    "tx_hash": "0xe241c553aa32ce6e66174c0569a48ec975c49b04e2ba3e2f23e555f505003f66",
    "posted_at": "2026-09-27T01:11:18.000Z"
  }
}